Method of forming cross-wound packages



Oct. 19, 1937.-

c. F. BER AN 2,096,316

METHOD OF FORMING CROSS W OUND PACKAGES Filed Sept. 7 1934 m r 1 j 2 T i Ql I 7 i 1 g z; A g 2 l m :1; I

. F O a 2 0 3 J INVENTOR Charles F Bercm I ATTORNEYS Patented Oct. 19, 1937 j UNITED STATES TENT OFFICE aosaals Mn'rnon OFT-FORMING caoss-woonn rnoxncns Charles F. Beran, Tuckahoe, N. r, assignor to Celanesc Corporation of America, a corporation of Delaware Application September '1, 1934, seria No. 743,067

' ,fl hisinvention relates to a method and device forv forming cross-wound packages having self supporting ends such as cheeses, cones etc. and more particularly to cross-wound packages 8 thatare uniform in twist and contain no ends of less twist than the bulk'of the yarn.

object of the invention is the economicand expeditious production of. cross-wound packages 1 in whicll the starting end of the thread or yarn 10 that contains practically no twist up .to approxi- .mately the amount of twist desired is removed from the package'withoutdisturbing thesolidnessthereof. Other'objects of the invention will appearfromthe following detailed description 18 anddrawing. l a i In the drawing where like numbers referto the same or similar elements: a Fig. .1 is an end elevation partially in section of a part of atake-up mechanism'of a cheese 30 windingfdevice with, the invention attached thereto. v Fig. 2 is 'a front elevation of a section of a takeup mechanism and is similar in locationof parts to the section shown'in Fig.1., g 25 Fi -'3 is a front view of an attachmentv for the cheese winding device shown in attached position inFigs landfl. j I I I 'In' the twisting. and winding of thread it is customaryJto have a fastly rotating bobbin containing theyarn to be twisted and a take-up package driven slower than the bobbin, thus imparting twist to the yarn. The yarnis wound upon a core by the take-up device, guided thereto I in a mannerto crosswindthe package by are- 35 eiprocating guide device. The yarn. after leaving the bobbin traverses aspace allowedfor the ballooning oi the yarn in the twisting action,

and passes through guides, cleaners andpossibly 'treatinggdevicesbefore reaching, thetake-up 49 mechanism. For this reason and also because the machine as a whole or as a part has'not reached the required speed and'the formation of thebal- 1001115 not established, the first yard or first few yards of yarn coming tothe take-up package 45 has 'not the samedegreeof twist as .thatlimpalfted tothe yarnv after the operation hasbeen completely"v started and balanced in speed. This length of yarn, may be from a fraction to ten yards in length when working on high speed ma- 5o chines with low denier artificial filament yarns.

Downward twisting devices are also employed in the art with the same results. w

I Formerly this len'gthof yarn was'taken up by the take-up package wound thereon in the same 55 manner as the yarn of the desired twist. In

as much as ten yards of yarn that could not be yarn of equal twists thereon. This is done without materially increasing the work of the twisting machine operator or slowing up the process whatsoever. Further, thereis no weakening of the package or any drawing action that might cause tangling or'slufiing of yarns on the end of the package. I a

According to my invention theuntwisted or n ,unprocessedend of the. yarn is wound on the take-up-package core at one end not regularly covered with yarn, then, when the delivery of twisted or processed yarn reaches the take-up package the yarn is automaticaliy taken over by the reciprocating guide and a package formed. The core with its package is. then removed from the device and the ridge of yarn at the end, not a part of the main package, is wound or cut ofi? and the end thus left free is tacked to the core 30 in a suitable manner. This invention is applicable to both the upward and downward twisting devices.

I This invention is applicable to the winding of twisted yarns of cotton, wool, real silk, flax, artiflclal yarns or the like wherein a cross-wound package, such as a cheese, or other like package is desired. The term yarn" as employed in the specification and in the claim includes within its scopethread, assemblies or bundles of a number of continuous filamentswhich may be in parallel relationship or which maybe twisted together, artificial bristles, straws, strips of foil,

short lengths oi staple fibres, or yarn spun' from such staple fibres. The yarns may or may not have been previously twisted, coated or otherwise processed. V

Although this invention is applicable to any type of yarn it is of particularapplicability to yarns formed of substantially continuous filaments. The substantially continuous filaments may be formed in any suitable manner as by extruding a cellulose material in a: liquid form through suitable orifices such as the manufacture of filaments containing reconstituted cellulose,

regenerated cellulose or organic derivatives of cellulose. Thus the filaments may contain such organic derivatives of cellulose as the organic esters of cellulose and cellulose ethers. Examples of organic esters of cellulose are cellulose acetate, cellulose format-e, cellulose propionate and cellulose butyrate while examples of cellu-' lose ethers are methyl cellulose, ethyl cellulose and benzyl cellulose.

The yarns may be twisted byany suitable mechanism such as those described in U. S. application 695,963 filed October 31, 1933, or more preferably by a device of the type described in U. S. application No. 742,108 filed August 30, 1934. In the drawing, wherein there is an illustration of one embodiment of the invention, those parts not directly related to the attachment have not been shown. Howeve reference may be made to the above application for details of the general mechanism.

In the drawing l is a power driven shaft having mounted thereon a cylindrical roll 2 of metal or other suitable materials that may be suitably covered with a'friction producing coating Ssuch as pressed cork, fibre mat, felt or thelike.

A stationary shaft4 may have mounted thereon an arm 5 having a split bearing 6 the pressure on which may be regulated by the screw 1. The shaft 4 is supported from the main frame of the device. Mounted in the end of the arm 5 cpposite its pivot is a shaft 8 that supports a core 9 upon which the take-up package is formed. The

shaft 8 is held from rotation by a split bearing l0 held compressed by the screw ii. A handle l2 cooperates with means I 3, which does not form part of the instant invention and which is shown, in detail in application S. No. 742,108, filed August 30, 1934, for holding the core 9 against rotation relative to the shaft 8, and inoperative position to receive the yarn to be wound.

In operation, at the commencement the core 9 or if the operation has been started the wound yarn on the core9 rests on the friction roller 8 and is rotated thereby at a constant peripheral speed. As the package is being formed the yarn is guided to the package by a reciprocating guide l4 that is' fastened or clipped to a reciprocating rod l5. This guide member .is of the self threading type. The stroke of reciprocation of guide 14 is slightly less than the length of the core 9 such that the package is formed with from A;

to V inch ofcore projecting from each end of the package. For example, a popular size package may have a core 5 inches long while the actual mass of yarn is only 4% inches .long with inch of core protruding from-one end. The coremay be formed of pressed paper, cardboard, resin-fibre composition, molded resins, molded compounds of organic derivatives of cellulose or similar material and is preferably formed with a yarn holding slot or notch 9' in one end for retaining and gripping the feed end of the yarn until the yarn has built up to a not to slip on the core.

Mounted on the arm 5 and clamped in place by screw i l is a bracket 16 having a depending section II containing anear l8 on one side and a stud shaft l 9 on the other side thereof. Mounted for rotation on the stud shaft I9 is a bearing member 20 having a slide bearing 2| therein adapted to slidably hold a shaft22. The shaft 22 has fastened at one of its ends a pulley or grooved wheel 23 while the other end is threaded as at 24 for registry with a threaded hole in the ear I8. At the end of the threaded section 24 0f .the operator.

sufllcient depth the shaft 22 is an abutment member 2 for preventing the shaft 22 from falling out of the slide threaded shaft 22 on which the wheel is mounted screwed into its innermost position in the ear l8.

The core holding device is then lowered into place so that the core 9 rests on the friction roll 8 which causes the core to rotate and take up the yarn. Asthe yarn is pulled over the grooved wheel 29, the wheel is caused to rotate by the friction of the yarn and this in turn unscrews the threaded shaft from the ear of. the bracket. When the shaft is completely unscrewed, the unbalanced load of the wheel and yarn causes. the

wheel and shaft bearing to rotate on the bearing pivot l9 and fall out of "engagement with the yarn as shown in dotted lines in Fig. 3. After the yarn has fallen from the grooved wheel it lies in the path of reciprocating guide member l4 which is self threading and immediately picks up the yarn and guides it onto the core 9 to form a cross-woundpackage. The operator may as soon as the yarn is picked up by guide l4 return the bearing member to a position shown in full lines Fig. 3 and screw the shaft back into the ear 19 into the starting position ready for the next package. a

In this manner the untwisted end of the yarn is wound upon the first section of the core which is usually a half inch in length. The amount of thread wrapped on this section will depend upon thediameter of wheel 29 and the pitch of the thread 24 on shaft 22 all of which may readily be varied to' accomplish the desired length of feed not to be included. in the finished package.

The untwisted end of the yarn is thus wound may be picked up by the guide 14 unaided by When, the package has been formed, thesame may be removed from the device by raisingthe arni 5 and releasing the core clamping means l3 after which the package may beeasil'y slipped off and an empty core may then be inserted in the device. The package may consist or; a solidwell formed cheese of uniform yarn on a core and also a small ridge of windings on the normally naked end of the core. Ifdesired the op operations, to bereinserted in the notch of the core. This may be done by removing the original end of the yarn from the notch and pulling the windings undone or oil? from the package end, severing the yarn about a foot from, where it crosses in under the main package, rewinding the foot of yarn and hooking the new end in the notch. Or if desired, the 'o'peratormay cut through all but the last few windings of the aux- 7 rected to the twisting and winding of yarnit is V I ,0 1 also generallyapplicable to any treatment or processing of yarnwherein the yarn is packaged into a cr0ss-wound package such as a coneor a I cheese or other package that has selt supporting 5 ends". Thus in applying size, lubricant, tints, dyes or other material .to the yarn during awinding operationit maytbe' desired not to include in the finished package the uniformly treated starting end that receives too little or' too much 40 treatment duringthreading oi the device and the I gaining of a speed in equilibrium with the treating means such that the yarn begins to come to'the package with uniform treatment. ,1 His to be understood that the foregoing de- 15 tailed: description and drawing are merely given 1 I by wayvot illustration and many alterations may be madev therein without departing from the spirit or my invention. Having described by invention, what I desire to secure by Letters Patent is:

Method of forming on a core a cross-wound package of uniformly twisted yarn, which comprises applying twist to the yarn while winding a predetermined length thereof on a part or the core normally left exposed, then, without interrupting the twisting and winding operations, proceeding with the winding so as to form a crosswound package on that part 01' the core normally employedfor the purpose and, thereafter, removingand discarding the predetermined length of yarn first wound on the core.

' CHARLES F. BERAN. 

